Controlled studies demonstrate that methods using soy related peptides inhibit H3 acetylation, reduce expression of HMG CoA reductase and increase LDL receptor and Sp1 expression in mammals. The method includes: a) forming an insulation film, a predetermined area of which is removed, between a first substrate and a second substrate; and b) forming a floating structure in the removed predetermined area. The nMOS-configured power source circuit includes a current generating nMOSFET, and generates a first current having temperature characteristics of an output current dependent on an electron mobility. Each key element is adapted to be rotated in said second rotating direction upon application of a force onto the protrusion in a third direction.